<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>登录页面</title>
    <style>
        div {
            width: 400px;
        }
        
        .t2 {
            width: 360px;
            height: 48px;
        }
        
        .t3 {
            width: 360px;
            height: 48px;
        }
    </style>
</head>

<body>
    <div>
        <h3 class="t1">用户登录</h3>

        <div class="t2">
            <input type="text" class="ipt-tel" placeholder="手机号/超星号" maxlength="50">
            <p class="err-txt" id="phoneMsg"></p>
        </div>
        <div class="t2">
            <input type="text" class="ipt-tel" placeholder="学习通密码" maxlength="12">
            <br>
            <input type="button" value="登录">

        </div>
    </div>
</body>

</html>